2 conquerors players using maphck, watching opponents bases and my base at multiple occurences in the fog of war, at key times of the game to know if they can attack or not and check what’s cooking during a FFA
“SuperOxide” (abbasid player) and “a normal SCⅡ player” (chinese),
Game : YAMATO CANON's Game – AoE4 World
Especially late game you will notice if you watch carefully that they check in opponent’s bases from time to time, especially the chinese player.